Disassembling tool having pivotal grippers on a sleeve with rotatable and impact means



Aprll 19, 1966 w. H. COLEMAN n 3,246,391

DISASSEMBLING TOOL HAVING PIVOTAL GRIPPERS ON A SLEEVE WITH ROTATABLE AND IMPACT MEANS Filed Jan. 29, 1965 2 Sheets-Sheet l 2 Sheets-Sheet 2 W. H. COLEMAN Il ROTATABLE AND IMPACT MEANS April 19, 1966 DlsAssEMBLING TooL HAVING PrvoTAL GRIPPERS oN A SLEEVE WITH Filed Jan. 29, 1965 United States Patent O 3,246,391 DISASSEMBLING TOOL HAVING PIVOTAL GRIP- PERS N A SLEEVE WITH RGTATABLE AND IMPACT MEANS William Harold Coleman II, Signal Mountain, Tenn., assigner to E. I. du Pont de Nemours and Company, Wilmington, Del., a corporation of Delaware Filed Jan. 29, 1965, Ser. No. 428,905 Claims. (Cl. 29--240) This invention relates to devices for pulling rolls or similar objects from shafts or axles on which they are fitted in relatively fixed frictional engagement.

The equipment normally employed to remove a textileforwarding roll from a freely rotatable shaft includes some sort of a holding `device to maintain the roll stationary as a retaining nut is removed and as force is applied to free the roll from its frictional engagement with the shaft. With such equipment, one man uses a strap wrench to hold the roll while another uses a suitable tool to remove the nut and -t-hen a puller to remove the roll from the shaft.

It is the most important object of this invention to provide an apparatus with which the retaining nut for -a roll and the roll itself can be removed in a single operation. A corollary objective is to eliminate the need for a secon-d man in the removal oper-ation. A further object of this invention is -to avoid roll damage by eliminating the need for strap wrenches.

These and other worthwhile objectives and advantages have been yachieved with an apparatus of the type which is described below with reference to the accompanying drawings wherein:

FIGURE 1 is a side view of the appara-tus in association with a roll to be removed, parts having been broken away and shown in section to reveal details of construction;

FIG. 2 is a side view of the apparatus as it appears during roll removal; and

FIG. 3 is a transverse cross section taken on line III-III of FIG. 2.

The apparatus embodiment chosen for purposes of illustration is adapted for use in the removal of a textileforwarding roll from a tapered shaft 12 on which it is both frictionally engaged and locked by a retaining nut 14. Roll 10 has a h-ub 16 provided with a complementally tapered bore and a groove 18.

As components, the apparatus includes an adapt-or shaft 2f), a first sleeve 22 and a second Isleeve 24. Adaptor 20 has a shallow nut-receiving socket 26 at one of its ends and an integral tool fitting 28 at its opposite end. At the l-ocation of socket 26, -the adaptor is enlarged, presenting a shoulder 30. Sleeve 22 has an inner annulus 32 within which adaptor 20 is rotatably telescoped. Between annulus 32 and shoulder 30, there is a ball thrust bearing 34.

Sleeve 22 has three longitudinal slots 36 which extend partially through its length and within each of which there is a jaw 38 pivotally mounted at 39. Each jaw 38 has a lateral extension or toot 40 and is normally biased to the position shown in FIG. 1 by a coil spring 42.

Sleeve 24 is slidably mounted 4on sleeve 22 for telescoping movement to the position shown in FIG. 2. In the course of that movement, jaws 38 are engaged and pivoted inwardly against the bias of springs 42, i.e., are pivoted to a position in which teeth 40 grip hub 16 within groove 18. Movement of sleeve 24 is restricted by its engagement, in an L-shaped slot 44, with a pin 46 on sleeve 22. When fully telescoped, it is rotated to place pin 46 in the lateral extension of slot 44. The apparatus is then ice ready for application of an impact tool 48 (FIG. 2) having a socket 50 for tool fitting 28.

In operation, the apparatus is first positioned with respect to roll 10 as shown in FIG. 1. With sleeve 24 fully retracted, jaws 38 are pivoted outwardly by the action of springs 42. When nut 14 is within socket 26, sleeve 24 is telescoped to the position show-n in FIG. 2, thereby pivoting jaws 38 inwardly and moving teeth 40 into groove 18. Sleeve 24 is then rotated clockwise to move pin 46 into the lateral extension of slot 44. Socket 50 is brought into engagement with fitting 28. With the impact tool 48 connected to a conventional source of power, torque i-s transmitted through fitting 28 and socket 26 to roll-retaining nut 14. Torque is applied in rapid, short impulses in a counterclockwise direction so that only a light hand pressure on the roll surface is required to prevent its turning. As nut 14 i-s removed from shaft 12, the shallow depth of socket 26 -and the spacing between shoulder 30 `and annnulus 32 are such that an axial thrust is transmitted from the nut through adaptor 20, thrust bearing 34, annulus 32 and jaws 38 to hub 16, i.e., the rotational movement of nut 14 is translated into an axial thrust by means of which roll 10 is forceably pulled from shaft 12 (FIG. 2). After rotation `and retraction of sleeve 24, jaws 38 swing outwardly to the position shown in FIG. 1 and the apparatus can then be detached. Alternately, the telescoped apparatus can be used as a handle for carrying the removed roll 10.

The illustrated apparatus obviously can be used to equal advantage in the removal of rotary elements other than textile-forwarding rolls. Various adaptations and modifications of a similar nature may be made without departing from the spirit of the present invention which is therefore intended to be limited Vonly by the scope of the appended claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. An apparatus for removing a rotary element from a shaft on which it is frictionally engaged and retained by a nut, said apparatus comprising: an adaptor shaft having a nut-receiving socket at one end and a tool fitting `at its opposite end, said shaft -being enlarged at said one end, presenting a shoulder; a sleeve having an inner annulus rotatably telescoped on said shaft; at least two jaws, each having Ian element-engaging tooth and each pivotally mounted on said sleeve for swinging movement of said tooth to and from a position of gripping engagement with said element; and a ring member slidably mounted on said Isleeve for movement into engagement with said jaws whereby to hold the latter in said position, said annulus then being in close proximity to said shoulder.

2. The apparatus of lclaim 1 wherein is provided a thrust bearing surrounding said member between the annulus and said shoulder.

3. The apparatus of claim 1 wherein is provided a spring means between each jaw and said sleeve for biasing the jaw away from said position.

4. An apparatus for 'removing a rotary element having a grooved hub from a tapered shaft on which it is frictionally engaged and retained by a nut, said apparatus comprising: an adaptor shaft having a shallow, nut-receiving socket `at one end and a -tool fitting at its opposite end, said shaft being enlarged at said one end, presenting a shoulder; a first sleeve having 1an inner annulus rotatably telescoped on said shaft; a thrust bearing surroundin-g the member between the annulus and said shoulder; at least two jaws, each having a hub-engaging tooth and each pivotally mounted for swinging move-ment of Patented Apr. I9, 1966 3 4 said tool to and from a position of gripping engagement References Cited by the Examiner With Said hub; a SCCIldASIeVC mounted Ol'l Said r'st sleeve for telescoping movement into engagement with said jaws whereby to swing the latter to said position, 1352990 9/1920 Reinker 29- 261 1,367,816 2/1921 Kellen 29-264 said annulus then being in close proximity to said shoul- 5 1 550 802 8/1925 Ham ton et al 29 264 der; and cooperating pin and slot mean-s on said sleeves 1750702 3/1930 Carlp V29 *264 for guiding the lsecond sleeve in its telescoping movement 2'380980 8/1945 Loom-y 29 263 and for locking it against movement when telescoped. 218531774 9 /1958 Peterson- 264 X 5- The apparatus 0f Claim 4 wherein is Provided a 3,074,156 1/1963 Hinrichsen et ai 29-262 X spring means between each jaw and said rst sleeve for 10 biasing the jaw away from said position. WILLIAM FELDMAN, Primary Examiner. 

1. AN APPARATUS FOR REMOVING A ROTARY ELEMENT FROM A SHAFT ON WHICH IT IS FRICTIONALLY ENGAGED AND RETAINED BY A NUT, SAID APPARATUS COMPRISING: AN ADAPTOR SHAFT HAVING A NUT-RECEIVING SOCKET AT ONE END AND A TOOL FITTING AT ITS OPPOSITE END, SAID SHAFT BEING ENLARGED AT SAID ONE END, PRESENTING A SHOULDER; A SLEEVE HAVING AN INNER ANNULUS ROTATABLY TELESCOPED ON SAID SHAFT; AT LEAST TWO JAWS, EACH HAVING AN ELEMENT-ENGAGING TOOTH AND EACH PIVOTALLY MOUNTED ON SAID SLEEVE FOR SWINGING MOVEMENT OF SAID TOOTH TO AND FROM A POSITION OF GRIPPING ENGAGEMENT WITH SAID ELEMENT; AND A RING MEMBER SLIDABLY MOUNTED ON SAID SLEEVE FOR MOVEMENT INTO ENGAGEMENT WITH SAID JAWS WHEREBY TO HOLD THE LATTER IN SAID POSITION, SAID ANNULUS THEN BEING IN CLOSE PROXIMITY TO SAID SHOULDER. 